Cleaning my chain today before lubing and started looking closely at stuff. This bike has 2700 miles and is 105 componentry level. Of the miles, I guess 85%+ have been using the large ring in a compact gearset (50/34), maybe more since I'm rarely in the 34.

Any rate, the front large gear doesn't look right, the teeth look worn with the tops of some gone. How many miles can you expect from a crankset anyway? It is 1000 miles into the 2nd chain.

Below are shots of the crankset large gear, small gear and rear casette. From my limited experience, only the front large gear looks bad. Seems that I should get a bunch more than a few thousand miles from a crankset. This is Florida and there is sand everywhere. Am I getting fast wear because of the sand?

Does not look excessively worn to me for the mileage stated. Your chain is going to need replaced long before the chain ring. I never have but know riders who have gotten 20,000 miles out of chain rings.

Cleaning my chain today before lubing and started looking closely at stuff. This bike has 2700 miles and is 105 componentry level. Of the miles, I guess 85%+ have been using the large ring in a compact gearset (50/34), maybe more since I'm rarely in the 34.

Any rate, the front large gear doesn't look right, the teeth look worn with the tops of some gone. How many miles can you expect from a crankset anyway? It is 1000 miles into the 2nd chain.

Below are shots of the crankset large gear, small gear and rear casette. From my limited experience, only the front large gear looks bad. Seems that I should get a bunch more than a few thousand miles from a crankset. This is Florida and there is sand everywhere. Am I getting fast wear because of the sand?

I would say the chain rings look fine, the teeth are shaped weird to aid in shifting. I would also say it looks a little dry, how often do you lube your chain and what do you use?

Chainrings look fine. I would think they look dry because you had just cleaned the chain and were about to lube it.

How did you scrape your front derailleur?

That would be correct, I had just spent about a half hour with a bucket with purple cleaner/degreaser and a nylon brush that looks like an over scale tooth brush.

I'm not sure how the derailleur got scraped, the chain was thrown somehow in a crash I had 6 weeks ago and I'll bet it happened then. The scrape is a lot more obvious in the flash reflection than it is looking at the bike.

Glad to hear that the crankset is fine, thanks for the help.

Quote:

Originally Posted by Wogster

I would also say it looks a little dry, how often do you lube your chain and what do you use?

As above, the chain was just cleaned as happens about every 3 weeks or around 400-500 miles. I'm trying a new lube on the recommendation of a friend who is still into motocross. It is Dupont multi-purpose spray dry wax lube w/teflon and moly that supposedly out performs other lubes by 5 to 1. Very interesting stuff read this http://www.webbikeworld.com/t2/motor...chain-lube.htm

. I'm trying a new lube on the recommendation of a friend who is still into motocross. It is Dupont multi-purpose spray dry wax lube w/teflon and moly that supposedly out performs other lubes by 5 to 1. Very interesting stuff read this http://www.webbikeworld.com/t2/motor...chain-lube.htm

I got an 11 oz spray can at Lowes for less than $5

That does look like some interesting stuff. Anyone else have any pros and cons about this stuff?

That does look like some interesting stuff. Anyone else have any pros and cons about this stuff?

If you read the reviews here (link) at Amazon, you'll see that they are all raving and are about 50/50 motorcycle/bicycle. I did immediately notice that the lube is totally dry and doesn't attract grime.

That would be correct, I had just spent about a half hour with a bucket with purple cleaner/degreaser and a nylon brush that looks like an over scale tooth brush.

I'm not sure how the derailleur got scraped, the chain was thrown somehow in a crash I had 6 weeks ago and I'll bet it happened then. The scrape is a lot more obvious in the flash reflection than it is looking at the bike.

Glad to hear that the crankset is fine, thanks for the help.

As above, the chain was just cleaned as happens about every 3 weeks or around 400-500 miles. I'm trying a new lube on the recommendation of a friend who is still into motocross. It is Dupont multi-purpose spray dry wax lube w/teflon and moly that supposedly out performs other lubes by 5 to 1. Very interesting stuff read this http://www.webbikeworld.com/t2/motor...chain-lube.htm

On the DuPont teflon. Been using it on my motorcycles for a couple years with excellent reults. Clean and cheap a combination that can't be beat. One of the bikes makes a 120HP/70FT-LBS and I'm getting about 30K miles from a chain. Been using it on the bicycle as well. I don't make near that much power but it works well there too.

I find that a worn chain ring gets sharper and sharper. When, you are likely to get cut putting a chain on it, it is probably time to replace it. A chain ring usually lasts over 20,000 miles. A way to get more wear out of your rear cluster and chain ring is to change your chain before it gets overly worn. You can buy a little gauge for about $10 at your LBS that makes measuring chain wear on the chain very easy.

My original concern was from ignorance, I thought that the teeth on my chain ring had worn so much that some of them were breaking off at the tips. Got a lot to learn, I guess. Went by the LBS this PM and took this picture of a brand new chain ring of the same type. Looked at several chain rings of different manufacturers and noticed that not all had the alternating tooth shapes.